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ASTM 403CB+, H46, B50A365, S40300, B50A365B,403 Details

ASTM 403CB+, H46, B50A365, S40300, B50A365B,403 Standard Download

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403CB+, H46, B50A365, S40300, B50A365B,403 Application:STAINLESS STEEL BAR & FORGINGS,CHROMIUM-NIOBIUM-IRON ALLOY

Category Type Grade Microstructure Designations
Grades Stainless Steels 403CB+, H46, B50A365, S40300, B50A365B,403 Martensite USA - ASTM , GE Approval to B50A365 - STAINLESS STEEL BAR & FORGINGS (CHROMIUM-NIOBIUM-IRON ALLOY, 403 Cb+)
ASTM A276 - Standard Specif i cation for Stainless Steel Bars and Shapes

Chemical composition(wt.%) of 403CB+, H46, B50A365, S40300, B50A365B,403 grade: GE Approval to B50A365

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.13 0.18
Si - 0.50
Mn 0.40 0.60
P - 0.030
S - 0.030
Cr 11.50 13.00
Ni - 0.50
Mo - 0.20
Nb 0.15 0.45
Al - 0.05
403CB+, H46 grade stainless steel is an AOD + ESR melted alloy with additional alloying elements giving it good strength and temper resistance at higher temperatures up to 1200oF. Similar to the 410 stainless this grade has the ability to be heat treated to multiple different strength levels. Because of the temper resistance this alloy is soley used in the power generation market as steam and gas turbine blades.

General Electric Material B50A365 identifies a Chromium-Niobium alloy steel used for compressor blading, turbine blading, and forgings.
This specification contains the following classes:B50A365A, B50A365A1, B50A365B, B50A365, B1B50A365C, Electric furnace material, heat treated for final properties Electric furnace material, annealedConsumable - Electrode remelt material, heat treated for final propertiesConsumable - Electrode remelt material, annealed Forgings for Non-bucket applications - Consumable Electrode remelt material, heat treated for final properties.


Material shall be heated to a temperature of 2000-2050°F (1095-1135°C) and held at temperature for sufficient time to assure uniform temperature within the load and each part thereof. The material shall then be quenched in oil or rapidly moving air, as approved in the manufacturing process plan，to a temperature below the Mf martensite finish temperature, to assure complete transformation. Material made to Classes A and C and material that is made to Class B without straightening or cold finishing shall then be uniformly heated to a minimum tempering temperature of 1185°F (640°C), and held for the time necessary to achieve all of the required properties.

Mechanical properties of grade 403CB+, H46, B50A365, S40300, B50A365B,403 GE Approval to B50A365

Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
793 (≥) 962 (≥) 22 43 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical properties of grade 403CB+, H46, B50A365, S40300, B50A365B,403 GE Approval to B50A365

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
598 (≥) 255 (≥) 21 23 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 333
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
757 131 875

403CB+, H46, B50A365, S40300, B50A365B,403 - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
403CB+, H46, B50A365, S40300, B50A365B,403 ASTM USA
STAINLESS STEEL BAR & FORGINGS,CHROMIUM-NIOBIUM-IRON ALLOY
Y1Cr18Ni9 GB China
Improve the machinability, ablation resistance. Suitable for automatic lathe production of bolt and nut
1Cr18Ni9 GB China
High strength after cold forming, but elongation than 1 cr17ni7 slightly worse. Used in architectural decoration parts
1Cr18Mn10Ni5Mo3N GB China
Of urea with good corrosion resistance, can produce urea corrosion of the equipment.
1Cr17Ni7 GB China
High strength after cold forming. Used in railway vehicle, conveyor belt, bolt and nut, etc
Y1Cr18Ni9Se GB China
Improve the machinability, ablation resistance. Suitable for automatic lathe production of rivets, screws
0Cr18Ni9 GB China
Seamless stainless steel tubes for boiler and heat exchanger
00Cr19Ni10 GB China
Carbon content lower than 0Cr19ni9 steel, excellent intergranular corrosion resistance, is used for welding after the class is not processed parts
1Cr17Mn6Ni5N GB China
Nickel steel grade, instead of number 1 cr17ni7 and magnetism after cold working, used in railway vehicle, etc
1Cr18Mn8Ni5N GB China
Nickel steel, instead of 1cr18ni9
0Cr19Ni9N GB China
Based on 0cr19ni9 plus N, strength increase and the plastic is not down. Reduce the thickness of the material. As a structure with strength components
0Cr19Ni10NbN GB China
Based on zero cr19ni9 plus N and Nb, with better than 0 cr19ni9 properties and USES
00Cr18Ni10N GB China
In 00cr19ni10 adding N, on the basis of the above grades also features, use the same as the 0 cr19ni9n, but better intergranular corrosion resistance
1Cr18Ni12 GB China
Compared with 0 cr19ni9, processing low hardenability. Used for spinning processing, special drawing, cold heading
0Cr23Ni13 GB China
Corrosion resistance and heat resistance are better than 0cr19ni9
0Cr25Ni20 GB China
Oxidation resistance is better than 0cr23ni13. Mostly used as heat resistant steel
0Cr17Ni12Mo2 GB China
Seamless stainless steel tubes for boiler and heat exchanger
1Cr18Ni12Mo2Ti GB China
Seamless stainless steel tubes for boiler and heat exchanger
0Cr18Ni12Mo2Ti GB China
Seamless stainless steel tubes for boiler and heat exchanger
A-29 1025 SAE USA
General use carbon steel rod

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